77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
from logging.config import fileConfig
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from sqlalchemy import engine_from_config, pool
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from alembic import context
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from modelforge_api.persistence.models import Base
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from modelforge_api.settings import get_settings
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config = context.config
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if config.config_file_name is not None:
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fileConfig(config.config_file_name)
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def _database_url() -> str:
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"""Where the migration runs, in order of explicitness.
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1. `-x db_url=...` on the command line
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2. a URL the caller set programmatically, or in alembic.ini
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3. MODELFORGE_MIGRATION_DATABASE_URL
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4. MODELFORGE_DATABASE_URL only outside production
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env.py used to overwrite whatever the caller had set with the settings default
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unconditionally, so both explicit forms were silently discarded. A bootstrap or upgrade
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rehearsal aimed at an isolated copy would have migrated the deployment's own database while
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reporting success against the copy.
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"""
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supplied = context.get_x_argument(as_dictionary=True).get("db_url")
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if supplied:
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return str(supplied)
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configured = config.get_main_option("sqlalchemy.url", None)
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if configured:
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return configured
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settings = get_settings()
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if settings.migration_database_url is not None:
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return settings.migration_database_url.get_secret_value()
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if settings.env == "production":
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raise RuntimeError(
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"production migrations require MODELFORGE_MIGRATION_DATABASE_URL; the API runtime "
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"credential is intentionally not a migration credential"
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)
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return settings.database_url
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config.set_main_option("sqlalchemy.url", _database_url())
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target_metadata = Base.metadata
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def run_migrations_offline() -> None:
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context.configure(
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url=config.get_main_option("sqlalchemy.url"),
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target_metadata=target_metadata,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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compare_type=True,
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)
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with context.begin_transaction():
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context.run_migrations()
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def run_migrations_online() -> None:
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connectable = engine_from_config(
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config.get_section(config.config_ini_section, {}),
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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with connectable.connect() as connection:
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context.configure(connection=connection, target_metadata=target_metadata, compare_type=True)
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with context.begin_transaction():
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context.run_migrations()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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